Oxidized petroleum pitch

ABSTRACT

A binder pitch derived from an aromatic petroleum feedstock by batchwise oxidation of the aromatic petroleum feedstock, preferably in the presence of a residue of previously oxidized feedstock wherein the combined feedstock-oxidized feedstock charge is heated to about 600*-700*F., then oxidized with an air flow rate of up to about 0.2 cubic feet per minute oxygen per barrel (c.f.m./bbl.), the exothermic and applied temperature being controlled during oxidation between about 680*-750*F., with concurrent distillation of light ends. The polymerizationoxidation is continued in this temperature range until a binder pitch having a desired softening point with a high Conradson Carbon and a high benzene insoluble content is reached. The product containing a softening point of about 210*-250*F., a benzene insolubles of about 25-35% and a Conradson Carbon in excess of about 48%, is particularly useful as an electrode binder pitch. Binder pitches for use as foundry binder pitch, fiberboard pitch, and pipe saturates, can be made by the present invention.

United States Patent 1191 Seinfeld et al.

[451 Dec. 24, 1974 OXIDIZED PETROLEUM PITCH [76] Inventors: Marc Michael Seinfeld, 5

Morningside Dr., Succasunna, NJ. 07876; George Alexander Shedyak, 2 Fender Pl., Fords, NJ. 08863 22 Filed: Feb.ll, 1974 21 App]. No.: 441,093

3,725,240 4/1973 Baum 208/22 Primary Examiner Delbert E. Gantz Assistant Examiner-Veronica OKeefe Attorney, Agent, or Firm-Albert L. Gazzola; Jordan J. Driks [57] ABSTRACT A binder pitch derived from an aromatic petroleum feedstock by batchwise oxidation of the aromatic petroleum feedstock, preferably in the presence of a residue of previously oxidized feedstock wherein the combined feedstock-oxidized feedstock charge is heated to about 600-700F., then oxidized with an air flow rate of up to about 0.2 cubic feet per minute oxygen per barrel (c.f.m./bbl.), the exothermic and applied temperature being controlled during oxidation between about 680750F., with concurrent distilla' tion of light ends. The polymerization-oxidation is continued in this temperature range until a binder pitch having a desired softening point with a high Conradson Carbon and a high benzene insoluble content is reached. The product containing a softening point of about 210-250F., a benzene insolubles of about 25-35% and a Conradson Carbon in excess of about 48%, is particularly useful as an electrode binder pitch. Binder pitches for use as foundry binder pitch, fiberboard pitch, and pipe saturates, can be made by the present invention.

7 Claims, N0 Drawings mating and enclosing engagement with said carrier lid.

8. The apparatus as set forth in claim 7 and further comprising separable hinge and fastener components for said container whereby the carrier lid alone can be used in said cell structure as the specimen supporting 5 menis- We claim: a

l. A binder pitch obtained from a feedstock of aromatic petroleum hydrocarbon bottoms derived from the thermal processing of petroleum hydrocarbons, by the batchwise oxidation-polymerization of said aromatic petroleum feedstock in the presence of a residue of previously oxidized aromatic petroleum feedstock, at a temperature in the range of 680-750F., while passing a source of oxygen through said feedstock at the rate of about 0.01 to 0.2 cu.ft./min. oxygen/bbL, at substantially atmospheric pressure.

2. A binder pitch as defined in claim 1, wherein said oxidation-polymerization is carried out using air as the source of oxygen.

3. A binder pitch as defined in claim 1, wherein said oxidation-polymerization is carried out using 0.1-0.15 cu.ft./min. oxygen/bbl.

4. A binder pitch as defined in claim 1, wherein the previously oxidized aromatic feedstock is present at a concentration in the range of about 5-50% by weight.

5. A binder pitch as defined in claim 1, wherein the previously oxidized aromatic feedstock residue is present at a concentration in the range of 25307( by weight.

6. A binder pitch as defined in claim 1, wherein the previously oxidized aromatic petroleum feedstock is derived from an aromatic petroleum feedstock having been oxidized at a temperature in the range of 680-750F., while passing a source of oxygen through said feedstock at the rate of 0.01 to 0.2 cu.fL/min. oxygen/bbL, at substantially atmospheric pressure.

7. A process for oxidizing an aromatic petroleum feedstock consisting essentially of passing a source of oxygen through said aromatic petroleum feedstock at the rate of about 0.01-02 cu.ft./min. oxygen/bbl. and within a temperature range of about 680 to 750F.

for from about 10 minutes to 3 hours.

l =l l= l= l 

1. A BINDER PITCH OBTAINED FROM A FEEDSTOCK OF AROMATIC PETROLEUM HYDROCARBON BOTTOMS DERIVED FROM THE THERMAL PROCESSING OF PETROLEUM HYDROCARBONS, BY THE BATCHWISE OXIDATION-POLYMERIZATION OF SAID AROMATIC PETROLEUM FEEDSTOCK IN THE PRESENCE OF A RESIDUE OF PREVIOUSLY OXIDIZED AROMATIC PETROLEUM FEEDSTOCK, AT A TEMPERATURE IN THE RANGE OF 680*-750*F., WHILE PASSING A SOURCE OF OXYGEN THROUGH SAID FEEDSTOCK AT THE RATE OF ABOUT 0.01 TO 0.2 CU.FT./MIN. OXYGEN/BBL., AT SUBSTANTIALLY ATMOSPHERIC PRESSURE.
 2. A binder pitch as defined in claim 1, wherein said oxidation-polymerization is carried out using air as the source of oxygen.
 3. A binder pitch as defined in claim 1, wherein said oxidation-polymerization is carried out using 0.1-0.15 cu.ft./min. oxyGen/bbl.
 4. A binder pitch as defined in claim 1, wherein the previously oxidized aromatic feedstock is present at a concentration in the range of about 5-50% by weight.
 5. A binder pitch as defined in claim 1, wherein the previously oxidized aromatic feedstock residue is present at a concentration in the range of 25-30% by weight.
 6. A binder pitch as defined in claim 1, wherein the previously oxidized aromatic petroleum feedstock is derived from an aromatic petroleum feedstock having been oxidized at a temperature in the range of 680*-750*F., while passing a source of oxygen through said feedstock at the rate of 0.01 to 0.2 cu.ft./min. oxygen/bbl., at substantially atmospheric pressure.
 7. A process for oxidizing an aromatic petroleum feedstock consisting essentially of passing a source of oxygen through said aromatic petroleum feedstock at the rate of about 0.01-0.2 cu.ft./min. oxygen/bbl. and within a temperature range of about 680*F. to 750*F. for from about 10 minutes to 3 hours. 